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ELECTROSPRAY MASS-SPECTROMETRY OF LANTHANIDE BETA-DIKETONE COMPLEXES .1. LIGAND-EXCHANGE PROCESSES INVOLVING ACETATE IONS AND LN(THD)3 COMPLEXES (LN = EU, GD, YB, THD = 2,2,6,6-TETRAMETHYL-3,5-HEPTANEDIONE)

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Abstract

The electrospray mass spectra of the lanthanide (Ln) 2,2,6,6-tetramethyl-3,5-heptanedione (thd) complexes Eu(thd)3, Gd(thd)3 and Yb(thd)3 were obtained from a methanol/water solution containing acetic acid. Protonated molecular ions Ln(thd)3H+ were obtained in each case. Extensive ligand exchange reactions in solution resulted in many mixed-ligand cationic species involving acetato ligands, H2O and H+. Tandem mass spectrometry of Ln(thd)3H+ gave the fragment ions Ln(thd)+ containing a lanthanide in the divalent state for Eu and Yb

Topics: QD
Publisher: ELSEVIER SCIENCE SA LAUSANNE
OAI identifier: oai:wrap.warwick.ac.uk:21666
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